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Pitting corrosion behaviour of austenitic stainless-steel coated on Ti6Al4V alloy in chloride solutions

Yamanoglu R., Fazakas E., Ahnia F., Alontseva D., Khoshnaw F.

Advances in Materials Science

2021

Vol. 21, nr 2(68)

5--15

This study aims to investigate the influence of adding a coating layer of austenitic stainless steel type 316L on Ti6Al4V alloy on corrosion behaviour. Samples of 316L, Ti6Al4V, and 316L on Ti6Al4V were prepared by hot-press sintering of their powders. The potentiodynamic polarization technique was used to characterize the corrosion behaviour of the samples in 0.9 and 3.5 wt. % NaCl concentrations. The corrosion potential (Ecorr.), current density (icorr) and corrosion rate (CR) of the sintered samples were compared in this study. The results showed that 316L samples had the best corrosion resistance, although micropits were observed on the surface, while Ti6Al4V samples had the lowest. This corrosion behaviour of sintered 316L samples can be interrelated to the existence of a passive layer on stainless steel alloys that can be attacked by chloride ions and causing localized corrosion. In general, the CR values of Ti6Al4V samples coated by 316L were between the 316L and Ti6Al4V samples. The CR values of the samples, in 0.9 wt. % NaCl, did not show significant changes with increasing time, as the CR for 316L values were around 0.003 mm/year, while for Ti6Al4V the CR values changed noticeably from 0.018 mm/year of 0 hr, to 0.015 mm/year for 24 hours. However, the changes were less than that of Ti6Al4V. For 3.5 wt. % NaCl solution, although the same order of CR remained, i.e., the CR values of coated Ti6Al4V samples were between 316L (lowest) and Ti6Al4V (highest), the overall CR values for the samples were higher than 0.9 wt. % NaCl.

Software development for a new robotic technology of microplasma spraying of powder coatings

Alontseva D., Krasavin A., Nurekenov D., Ospanov O., Kusaiyn-Murat A., Zhanuzakov Y.

Przegląd Elektrotechniczny

2018

R. 94, nr 7

26--29

The paper presents the main results of software development for a new robotic technology of microplasma spraying of powder coatings to protect surfaces of industrial parts. The numerical methods have been implemented for modeling temperature fields induced by the radiation treatment of coatings. The proprietary software products have been developed to perform calculations of temperature fields in two-layer heat absorbers under irradiation and to provide the desired trajectory of a plasma source. The laboratory samples with coatings have been obtained.

W artykule przedstawiono główne wyniki opracowywania oprogramowania dla nowej zrobotyzowanej technologii mikroplazmatycznego natryskiwania powłok proszkowych w celu ochrony powierzchni części przemysłowych. Zastosowano metody numeryczne do modelowania pól temperatury indukowanych przez napromienianie powłok. Opracowano autorskie produkty do wykonywania obliczeń pól temperatur w dwuwarstwowych pochłaniaczach ciepła w warunkach napromieniowania i zapewnienia pożądanej trajektorii źródła plazmy. Uzyskano próbki laboratoryjne z powłokami.

Development of technology of microplasma spraying for the application of biocompatible coatings in the manufacture of medical implants

Alontseva D., Borisov Y., Voinarovych S., Kyslytsia O., Kolesnikova T., Prokhorenkova N., Kadyroldina A.

Przegląd Elektrotechniczny

2018

R. 94, nr 7

94--97

This paper describes the equipment design of E. O. Paton Electric Welding Institute and technology of microplasma spraying of coatings from powder and wire materials for applying biocompatible coatings for medical implants. The given equipment was introduced at an experimental robotics complex for microplasma spraying at D. Serikbayev East-Kazakhstan State Technical University By this example the authors discuss the challenges and prospects of the development and implementation of microplasma spraying technology.

W artykule opisano konstrukcję sprzętu w E. O. Paton Electric Welding Institute oraz technologię natryskiwania mikroplazmy powłok z proszków i materiałów drucianych w celu nanoszenia biokompatybilnych powłok na implanty medyczne. Dany sprzęt został wprowadzony do eksperymentalnego kompleksu robotyki do natryskiwania mikroplazmy na Uniwersytecie Technicznym D. Serikbayev East-Kazakhstan. Na tym przykładzie autorzy omawiają wyzwania i perspektywy rozwoju i wdrażania technologii mikroplazmatycznej.